Reopened but Not Calm: Iran's New Warning Puts Oil Tankers on Edge Again

Picture Credit: by Boston Herald

The headlines say the Strait of Hormuz is open. Ship traffic has rebounded sharply, 258 vessels transited last week, nearly double the 138 that passed through during the worst weeks of the war. Saudi Arabia has shipped 34 million barrels through the waterway since June 17. Brent crude has fallen to around $72.68 a barrel. The crisis, on paper, appears to be easing.

Iran's military has a different view.

On Thursday, the Khatam al-Anbiya joint military command issued a blunt warning to every oil tanker in the strait: use Iran's approved routes or face what it called "an immediate and forceful response." Any deviation from designated navigation protocols, it said, would "endanger the security of the violating vessels." US military presence in the waterway, the statement added, "causes insecurity" and any interference "will be met with a rapid and decisive reaction."

The warning lands at a moment of deliberate ambiguity. The interim US-Iran memorandum of understanding granted ships passage without charges, but only for 60 days. Tehran has been explicit that once that window closes, it intends to control vessel routes permanently and charge fees for passage through the strait, a demand that upends decades of international maritime practice. The US and Gulf Arab states have flatly refused to accept it.

The fragility beneath the reopening headlines became visible last weekend, when an attempt by Oman and a UN agency to establish an alternative coastal route near Oman's shore triggered attacks across the region.

For Sri Lanka, which imports 100% of its oil and whose fuel costs surged nearly 75% during the war months, the stakes of any renewed disruption are immediate and direct. A fifth of the world's oil moves through Hormuz. The 60-day clock is running. What happens when it expires, and who blinks first, may determine what Sri Lankans pay at the pump for the rest of 2026.